Wrench.



No. 823,390. PATENTED JUNE 12, 1906. W. BUHL. WRENGH. APPLICATION FILED JUNEQ, 1905.

2 SHEETS-SHEET 1.

witnesses M25. Q2 La.

`No. 823,390. PATENIED .TUNE l2, 1906. W. BUHL. WRENCH.

APPLICATION FILED JUNE 9, 1905.

2 SHEETS-SHEET 2.v

i www.. @mi

Witnesses atroz/Mug WILLIAM BUHL, E* MINNEAPOLIS, MtrNnEsorn.

W REN C H..

Specification o f Letters Patent,

Patented-Lese 12, 1996i Applicationi'ledlull 9., 19015. Serial No! 264,499,

T0 a/ZZ whom it concern;

Be it known` that I., WILLIAM; BUHL, a. citizen of the United States, residing at Minne apolis in the county of. Hennepin and State of Minnesota, have linvented new and useful A Improvements in Wrenches, of whichl the following is a specification.

The invention relates tov an improvement in wrenches, particularly sliding-j aw wrenches, comprehendingspecifically imp rovement in the means for operating the sliding jaw.

The main object of the invention is the production of simple and eiective means whereby the sliding jaw of the wrench may be easily and quickly adjusted to the desired position. l

The preferred embodiment of details of structure will be described in the following specification and are clearly illustrated in the accompanying drawings, in which- Figure 1 isa view in elevation of a Wrench embodying the preferred form of my im-v proved operating mechanism. Fig. 2 is a longitudinal central section of the same, parts being shown in elevation. Fig., 3 is a transverse section of the same on the line 3 3 of Fig. 2. Fig. 4 is a perspective view of the thread-engaging projection secured to the shank of the wrench. Fig. 5 is a view in elevation with the wrench-shank broken off of a modified form of operating mechanism. Fig. 6 is a longitudinal section of the same. Fig. 7 is a transverse section on the line 7 7 of Fig. 6. F ig.A 8 'is a broken sectional view, partly in elevation, of another form of operating means.

Referring particularly to Figs. 1 to 4 of the drawings, my improved wrench comprises a fixed jaw 1, supported at the upper end of the shank 2, to the lower end of which is fixed the handle 3, all of which parts may be of any usual or preferred form. The sliding jaw comprises a jaw proper, 4, formed integral with and on the upper end of the jawbarrel 5, which barrel is arranged to slidably engage the wrench-shank 2. 6 represents the operating-screw having a portion 7 formed with ordinary screw-threads and arranged for threaded engagement with an opening 8, formed in the base-ange 9 of the barrel. To the screw 6, beyond the barrel, is secured an operating-head 10, whereby the screw may be revolved, that portion of the screw within the barrel formed a worm-thread 11, arranged to engage a projection 12, suitably secured to the wrench- 14 to engage thev worm-thread 1.12.' In, 't ",e

Operation efthieterrnettheWrenehieveliitieIi of the screw 6 under the influence of thenut 10 will @euse a Slight leegtuinel- 1149 ement of the screw, due to threadedl con; nection with the opening. 7, this revolution of the screw causing the projection to ride in the worm-threads. enel.v 'ee the Wellthreads are of considerably greater. .pitch than the threads 7 the. sliding'jaw be. moved lengthwise the shank 2 quite. rapidly.`

The Comparative lengthwiee' movement of the sliding jaw is controlled 'solely the variation in pitch between the."wormthreads and the ordmary threads, it being` possible to so form the worm-,threadsI that' a' single revolution of the nut Sliding jew a Considerable deeeeee leegte wise the shank.

In Figs. 5, 6, and 7 the wrench comprises a fixed jaw 15, having a plurality of faces and 17 arranged, respectively, for engage.,- ment with the plane nut or with a pipe. The sliding jaw 18 is arranged with coperative faces 19 and 20 and is secured to a depending barrel 21, within which barrel at diametrically opposite points are arranged screw-rods 22, having worm-threads 23 for engagement with projections 24, the lower end of the screw-rods having threaded connection lat 25 26 with the base-flange of the barrel, all as described in the preferred construction. For simultaneous operation of the screw-rods 22, however, I prefer to secure on each of said rods beyond the barrel a gear-pinion 27, which pinions are arranged to intermesh with the gear-face ,28 of an annular operating member 29, supported for operation by the shank. Revolution of the annular member 29 will, through the medium of the gear-pin ion 27, revolve screw-rods 22, adjusting the sliding jaw lengthwise the shank, as in the preferred form.

In Fig. 8 the construction is similar in all respects to thev preferred form except that the proj ection for coperation with the worm-gear of the screw-rods 6 comprises a block 30, recessed on its vertical face at 31, in which recess is seated a ball 32, designed to engage the worm-threads and move the sliding j aw 4 lengthwise of the shank 2 when the screwrod has been revolved.

In each of the constructions described it will be noted that the main adjustment of the shank 2, and, comprising a,y laterally-plm @Qt-. ingy plate 1,3, having a.sn,t. ably-QII}G 1 Qd 9;

IOO

IIO

threads of the larger pitch thereto, a jaw movab sliding jaw is obtained through the variation in pitch of threads formed on a singlescrewrod, the threads of smaller pitch having engagement with the slidin jaw, while the ghave engagement witha fixed stop or projection carried by the shank of the wrench.

If preferred, I contemplate` the use of a coil-spring 33, encircling-the rod 11 intermediate the knee-head 9 and the nut 10, and also a'coil-spring between the nut l0 and the nut 34, which has the usual function of alocknut, though this latter feature is not illustrated.

Having thus described the invention, what is claimed as new is 1. A wrench having a fixed jaw and a shank, a movable j aw slidable lengthwise the shank, and an operating-rod having threaded connection with the movable jaw and with the shank within the movable jaw, the threads of the latter connection being of greater pitch than the threads of the former connection.

2. A wrench having: a shank, a jaw fixed thereto, a jaw movab eI thereon, a screw-rod having threaded connection with the movable jaw, said rod being formed within the jaw with worin-threads of greater pitch than the threads connecting said rodand the movable jaw, and a projection carried by the shank and arranged to engage 'said worm threads.

3. A wrench havin a shank, a jaw fixed Ie thereon, a screw-rod thread, and a projection fixed to the shank and engaging said worm-thread.

5. A wrench having a shank, a jaw fixed thereto, a jaw movable thereon, a screw-rod formed at its lower end for threaded connection with the jaw, the upper end of the rod within the jaw being formed with a wormthread, a projection fixed to the shank and engaging said worm-thread, and means for revolving the screw-rod.

6. A wrench having a shank, a jaw fixed thereto, a jaw movable thereon, a barrel depending from said movable jaw, a screw-rod having threaded connection with the barrel and extending upwardly therein, a nut fixed on the rod beyond the barrel, that portion of the rod within the barrel being formed with a wormthread, and aproj ection secured to the shank and engaging said worm-thread.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM BUHL.

Witnesses:

JAS. MERSEN, C. G. LARsoN. 

